1M Opener
Enhanced Precision: 1M-1N Forcing
o1M  
  r1N FORCING!
    oRebid original suit if 6+
    oBid 2nd suit if 6-4 but careful about 2C,2D, see below)
    o2C= 5332 or 4522.
      r2D= forcing
      r2(UnbidM)= weak, not contructive
      r2(BidM)= to play with 2-3 card support
      r3C= invitational
    o2D= guarantees 4 D unless opening bid 1S in which case might be 4531
      r2(UnbidM)= weak, not contructive
      r2(BidM)= to play with 2-3 card support
      r3C= to play
      r3D= invitational
    o2H (if opened 1S)= 4 hearts
      r3C/3D= to play, not constructive
    o2S (after o1H) opener shows 5-6 distribution, max hcp
      r3H= to play, not invitational
    o2N= 5044... equivalent to unusual NT
    o3C/3D/3H(after 1S)= 5+ cards in second suit, good hand, not forcing
    o3M= jump rebid, w good 6 card suit, good playing strength
        Jump shifts or jump minor raises (eg 1H-1N-2D-4C/4D are flower bids (4card sup & long strong, no solid suit slam?
            ...with solid suit, bid it then jump in it.
  With 16+hcp and three card support:
    If opener does not rebid his suit, jump to three of it= forcing, strongest three card support
    If opener rebids his suit, jump in your cheapest control, obviously forcing
    If opener rebids 3 of his suit, bid your cheapest control, obviously forcing